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#pragma once
namespace nall { namespace Encode {
struct BMP {
static auto create(const string& filename, const uint32_t* data, unsigned width, unsigned height, bool alpha) -> bool {
file fp{filename, file::mode::write};
if(!fp) return false;
unsigned bitsPerPixel = alpha ? 32 : 24;
unsigned bytesPerPixel = bitsPerPixel / 8;
unsigned alignedWidth = width * bytesPerPixel;
unsigned paddingLength = 0;
unsigned imageSize = alignedWidth * height;
unsigned fileSize = 0x36 + imageSize;
while(alignedWidth % 4) alignedWidth++, paddingLength++;
fp.writel(0x4d42, 2); //signature
fp.writel(fileSize, 4); //file size
fp.writel(0, 2); //reserved
fp.writel(0, 2); //reserved
fp.writel(0x36, 4); //offset
fp.writel(40, 4); //DIB size
fp.writel(width, 4); //width
fp.writel(-height, 4); //height
fp.writel(1, 2); //color planes
fp.writel(bitsPerPixel, 2); //bits per pixel
fp.writel(0, 4); //compression method (BI_RGB)
fp.writel(imageSize, 4); //image data size
fp.writel(3780, 4); //horizontal resolution
fp.writel(3780, 4); //vertical resolution
fp.writel(0, 4); //palette size
fp.writel(0, 4); //important color count
for(auto y : range(height)) {
const uint32_t* p = data + y * width;
for(auto x : range(width)) fp.writel(*p++, bytesPerPixel);
if(paddingLength) fp.writel(0, paddingLength);
}
return true;
}
};
}}
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